Honeywell CT3550 User manual

Place Bar Code Here
69- 1284- 2
OWNER’S GUIDE
® U.S. Re
g
istered Trademark
Cop
y
ri
g
ht © 2001 Hone
y
well • •All Ri
g
hts Reserved
Honeywell CT3550
PROGRAMMABLE THERMOSTAT
Weekda
y
, Saturda
y
and Sunda
y
Pro
g
rammable Heat and/or Cool
Low Volta
g
e
(
20 to 30 Vac
)
Thermostat and Wallplate
Model CT3550
Para pedir estas instrucciones en español, llame al 1-800-468-1502.
Pour obtenir ce ode demploi en fran
ç
ais, composer le 1-800-468-1502.
Table of Contents
Step 1. Prepare for Installation .................................................................................................................................. 5
Step 2. Remove Old Thermostat ............................................................................................................................... 6
Step 3. Mount Thermostat Wallplate ......................................................................................................................... 7
Step 4. Wire Wallplate Terminals ............................................................................................................................... 8
Step 5. Install the Batteries ....................................................................................................................................... 9
Step 6. Mount the Thermostat ................................................................................................................................... 10
Step 7. Customize Your Thermostat .......................................................................................................................... 11
Step 8. Set the Clock ................................................................................................................................................. 13
Step 9. Pro
g
rammin
g
................................................................................................................................................ 13
Step 10. Operatin
g
Your Thermostat ......................................................................................................................... 16
Step 11. Set the Fan and S
y
stem Ke
y
...................................................................................................................... 17
Smart Response™ Technolo
gy
................................................................................................................................. 20
Wirin
g
Dia
g
rams ........................................................................................................................................................ 21

69-1284—22
Total comfort temperature management with Smart Response™Technology.
Con
g
ratulations! You made a smart choice b
y
purchasin
g
y
our new Hone
y
well thermostat the smart thermostat that;
•Keeps
y
ou comfortable b
y
automaticall
y
calculatin
g
exactl
y
when the furnace or air conditionin
g
should
g
o on to
have the house at the desired comfort temperature b
y
the time
y
ou wake up or return home.
•Saves the maximum amount of ener
gy
and mone
y
b
y
automaticall
y
rememberin
g
to adjust the temperature when
y
ou leave home or
g
o to sleep.
•Provides the ultimate in comfort and convenience. It comes prepro
g
rammed. You can use the prepro
g
rammed
schedule, or set
y
our own.
This manual answers man
y
of the questions that can arise as
y
ou become familiar and comfortable with
y
our
Hone
y
well thermostat —the state of the art in home comfort controls.
Read these instructions carefull
y
. Failure to follow these instructions can dama
g
e the product or cause a hazardous
condition.
MERCURY NOTICE
If this thermostat is replacin
g
a control that contains mercur
y
in a
sealed tube, do not place
y
our old control in the trash. Contact
y
our local waste mana
g
ement authorit
y
for instructions re
g
ardin
g
rec
y
clin
g
and the proper disposal of this control, or of an old
control containin
g
mercur
y
in a sealed tube.
If
y
ou have questions, call Hone
y
well Inc. at 1-800-468-1502.
M10614
MERCURY
SWITCH
TYPICAL LOCATION OF A MERCURY
SWITCH IN A THERMOSTAT

3 69-1284—2
Time Set Program
Run
Program
Hold Temp
Set Current
Day/Time
Day Heat/Cool
Settings
Wake Leave Return Sleep
M18741
RAISES
TEMPERATURE SETTING
LOWERS
TEMPERATURE SETTING
DISPLAYS
CURRENT HEAT/COOL
TEMPERATURE SETTING
PROGRAM PERIODS
WAKE/LEAVE/RETURN/SLEEP:
ENTERS PROGRAMMING MODE
FAN KEY
SELECTS AUTO/ON
SYSTEM KEY
SELECTS HEAT/OFF/COOL
DIGITAL DISPLAY
SET CURRENT
DAY/TIME
SETS CURRENT
TIME AND DAY
RUN PROGRAM
RETURNS
THERMOSTAT
TO NORMAL
OPERATING MODE
HEAT/COOL SETTING
SWITCHES BETWEEN
HEAT SETPOINTS AND
COOL SETPOINTS
WHILE PROGRAMMING
TIME /TIME
SETS TIME FORWARD OR BACK
DAY
SETS DAY OF
THE WEEK
HOLD TEMP
SETS A HOLD
TEMPERATURE
SETTING AND
ACTIVATES
VACATION HOLD
FEATURE
System
Fan

69-1284—24
M18594
Aux Ht
System Off Auto
WakeLeaveReturnSleep
Mon
Wait Fan On Auto
In
Room
Humid
Outdoor
Filter
AM
Hold for
Repl Batt
Recovery
Cool
TueWedThuFriSatSun Days
Set Program Set Day/Time
Temporary Setting
Em Heat
Em Ht
DISPLAYS EITHER CURRENT
TIME OF DAY OR PROGRAM TIMES SHOWS THERMOSTAT IS IN
THE SET DAY/TIME MODE
SHOWS TEMPERATURE SETTING
CHANGED FOR THIS PROGRAM PERIOD
SHOWS THE TEMPERATURE
DISPLAYED IS THE CURRENT
SET TEMPERATURE
SHOWS THE TEMPERATURE
DISPLAYED IS THE CURRENT
ROOM TEMPERATURE
SHOWS THE BATTERIES ARE
LOW AND MUST BE
REPLACED
DISPLAYS EITHER ROOM
OR SET TEMPERATURES
SHOWS CURRENT FAN
KEY POSITION ON/AUTO
SHOWS THERMOSTAT IS
CALLING FOR THE FAN
SHOWS SMART RESPONSE IS OFF.
CONVENTIONAL RECOVERY IS ON
SHOWS THERMOSTAT IS PROCESSING
INFORMATION AND WAITING TO CALL FOR HEAT OR COOL
SHOWS SMART RESPONSE IS CHANGING
THE TEMPERATURE TO MEET THE
CURRENT PROGRAMS
SHOWS THAT THERMOSTAT IS
"CALLING" FOR HEAT OR COOL
SHOWS CURRENT
SYSTEM KEY POSITION
HEAT/OFF/COOL
SHOWS CURRENT
PROGRAM PERIOD
OR PERIOD BEING
PROGRAMMED
SHOWS CURRENT
DAY OR DAYS BEING
PROGRAMMED
SHOWS VACATION
HOLD DURATION
SHOWS WHEN
THERMOSTAT IS IN THE
PROGRAMMING MODE

5 69-1284—2
STEP 1. PREPARE FOR INSTALLATION
❑Check Table 1, the compatibilit
y
chart, to make sure the thermostat is compatible with
y
our s
y
stem. If
y
our s
y
stem
is not compatible, call Hone
y
well Customer Relations Center, toll-free, 1-800-468-1502.
Table 1. Compatibility Chart.
aCompatible with 2-wire Hone
y
well and Taco zone valves. Not compatible with 3-wire zone valves or 2-wire White
Rod
g
ers no. 1361 zone valves.
bNot compatible with an
y
120/240 volt s
y
stem.
Package Contents.
•Thermostat •Wallplate
•Screws and anchors •Wirin
g
labels
•3 Ener
g
izer®AA batteries •Owners manual
Tools Required
•Screwdriver
•Drill
System Type Compatibility with CT3550
Gas —Standin
g
Pilot Yes
Gas —Electronic I
g
nition Yes
Gas-fired Boilers Yesa
Gas —750 Millivolt Heat Yes
Oil-Fired Boilers Yesa
Oil-Fired Furnace Yes
Electric Furnace Yes
Electric Air Conditionin
g
Yes
Baseboard Electric (120/240 line volt)bNo
Sin
g
le Sta
g
e Heat Pump Yes
Multista
g
e Heat Pumps/Multista
g
e Equipment No

69-1284—26
STEP 2. REMOVE OLD THERMOSTAT
❑Test
y
our heatin
g
and coolin
g
s
y
stems to make sure the
y
work properl
y
. If either s
y
stem does not work, contact
y
our local heatin
g
/air-conditionin
g
dealer. To avoid compressor dama
g
e, do not operate the coolin
g
s
y
stem when
outdoor temperature is below 50°F (10°C).
❑Turn off power to the s
y
stem at the furnace or the fuse/circuit breaker panel.
❑Carefull
y
unpack
y
our new thermostat and wallplate. Save packa
g
e of screws, instructions, and receipt.
❑Remove the cover from the old thermostat. If the cover does not snap off when pulled firml
y
from the bottom, check
for a screw or screws used to lock on the cover.
❑Loosen the screw or screws holdin
g
the thermostat to the wallplate and lift the thermostat awa
y
.
❑Disconnect the wires from the old thermostat. As
y
ou disconnect each wire, attach the enclosed labels with the old
terminal desi
g
nation. If there are onl
y
two wires, the
y
do not need to be labeled. Wrap the wires around a pencil as
shown to keep them from fallin
g
back into the wall.
Special Installations
Read this section if
y
ou are replacin
g
:
•Clock thermostat with separate wires for the clock.
•Thermostat with six or more wires connected to it.
•Thermostat in a heatin
g
onl
y
s
y
stem with three wires.
Replacing a Clock Thermostat that has C or C1 Clock Terminals
If
y
ou are replacin
g
a Hone
y
well Chronotherm®Thermostat,
y
ou ma
y
find one or two wires
g
oin
g
to the C or C1 clock
terminals on the Chronotherm wirin
g
wallplate. Do not allow them to touch, or
y
ou can dama
g
e the transformer.
Disconnect the wires and wrap them separatel
y
usin
g
electrical tape. Do not wrap them to
g
ether. Place the wires
where the
y
will not interfere with the operation of the new thermostat. Record the colors and terminal desi
g
nation
labels of the remainin
g
wires.
Replacing a Thermostat that has Six or More Wires
If there are six or more wires (excludin
g
clock wires attached to terminals),
y
ou probabl
y
have a variation of a
multista
g
e heat pump or other multista
g
e s
y
stem. This thermostat is not compatible with multista
g
e s
y
stems, so return
the product to the place of purchase. For information about which pro
g
rammable thermostats will work with
y
our
s
y
stem, call Hone
y
well Customer Relations Center, at 1-800-468-1502.
WIRES THROUGH
WALL OPENING
M5136

7 69-1284—2
Replacing a Thermostat that has Three Wires
If
y
ou have three wires for a heatin
g
onl
y
s
y
stem and can operate the fan usin
g
the fan ON switch this thermostat
works with
y
our s
y
stem. However, some hot water (zoned) heatin
g
s
y
stems also have three wires. Your thermostat will
work onl
y
if
y
ou install an isolatin
g
rela
y
on these s
y
stems. For details, call
y
our local heatin
g
and/or coolin
g
contractor.
STEP 3. MOUNT THERMOSTAT WALLPLATE
❑Separate the wallplate from the thermostat b
y
placin
g
y
our thumb or fin
g
ers between
the bottom of the wallplate and the thermostat, and pullin
g
the wallplate up and awa
y
from the thermostat. See illustration at ri
g
ht.
❑Position the wallplate on the wall. Level the wallplate for appearance if desired. Use a
pencil to mark the two mountin
g
holes that best fit the application.
❑Remove the wallplate from the wall. Drill two 3/16 in. holes in wall (if dr
y
wall) as shown.
For materials such as plaster or wood, drill 7/32 in. holes where marked. Gentl
y
, tap the
(provided) anchors into the drilled holes until the
y
are flush with the wall.
❑Reposition the wallplate over the holes. Pull the wires throu
g
h the wirin
g
openin
g
.
Loosel
y
insert mountin
g
screws into each of the holes.
❑Level the wallplate if desired. Thermostat functions
properl
y
when not level.
❑Ti
g
hten mountin
g
screws.
M16427
WIRES
THROUGH WALL
WALL
MOUNTING
HOLES
M15044
MOUNTING
SCREWS
WALL
ANCHORS (2)

69-1284—28
STEP 4. WIRE WALLPLATE TERMINALS
IMPORTANT
All wiring must comply with local codes and ordinances. If
unsure about household wiring procedures, call your local
heating/air-conditioning contractor.
Refer to the labels
y
ou placed on the wires when
y
ou removed the
old thermostat (see illustration).
❑Match the letter of
y
our old thermostat wire with the correspondin
g
terminal letter on
y
our new thermostat. Refer to Table 2.
❑Remove the factor
y
-installed jumper connectin
g
terminals R and
RC if wires are connected to both of those terminals.
❑For wirin
g
dia
g
rams, if needed, see pp 21-22.
❑Loosen the terminal screws. Slip each wire beneath its matchin
g
terminal. Wraparound and strai
g
ht connections are both
acceptable, (see illustration). Ti
g
hten the terminals.
❑Plu
g
the hole in the wall with insulation to help prevent drafts from adversel
y
affectin
g
thermostat operation.
M16425
R
W
Y
G
M4826
FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM).
FOR STRAIGHT INSERTION
STRIP 5/16 IN. (8 MM).

9 69-1284—2
Table 2. Terminal Designations on Old and New Thermostats
aIf both RH and R terminals are present on existin
g
thermostat, remove jumper and connect Rh to R and R to Rc.
bDo not connect both O and B when wirin
g
to a sin
g
le sta
g
e heat pump. Connect O to O. Tape off B.
cTape off end of the wire with electrical tape and push the taped wire back into the wirin
g
hole in the wall.
STEP 5. INSTALL THE BATTERIES
IMPORTANT
Three AA alkaline batteries are included with the thermostat.
Batteries must be installed for programming and operation of
the thermostat and the heating/cooling system.
❑Install the batteries in the wallplate so the positive terminals all point
up (see illustration).
Terminal on Old Thermostat Connect To Description
R, RHa, 4, V R Power
Rc, RaRc Power for coolin
g
W, W1, H W Heat
Y, Y1, M Y Coolin
g
G, F G Fan
O O Chan
g
eover in cool. (Sin
g
le sta
g
e heat pump onl
y
).
BbBbChan
g
eover in heat. (Sin
g
le sta
g
e heat pump onl
y
).
Cc, Xc, BbDo not connect. Transformer common
W2, H2Do not continue installation.
Call 1-800-468-1502. Second sta
g
e heat.
Y2Second sta
g
e cool.
M10622
INSTALL 3 AA ALKALINE BATTERIES
AS SHOWN, POSITIVE (+) TERMINALS
TOWARD TOP.
WALLPLATE
B
RRCOWYG

69-1284—210
❑If the thermostat is alread
y
mounted on the wall, remove the thermostat
b
y
placin
g
y
our thumb between the thermostat and wallplate and
pullin
g
the thermostat up and awa
y
as shown.
When the batteries are runnin
g
low, a REPL BAT messa
g
e flashes for one
to two months before the batteries run out completel
y
. Replace the
batteries as soon as possible once the messa
g
e flashes.
IMPORTANT
Although the thermostat has a low battery indicator, replace the
batteries once per year to prevent leakage and to prevent the
thermostat and heating/cooling system from shutting down due
to lack of battery power in the thermostat.
If
y
ou insert new batteries within 20 to 30 seconds of removin
g
the old
batteries, the s
y
stem retains the current time and da
y
. If the displa
y
is
blank, the batteries are dead or installed incorrectl
y
. You must reset the time and da
y
. Refer to Set the Clock for
instructions.
As a precaution when leavin
g
home for lon
g
er than a month, chan
g
e batteries before leavin
g
to prevent
the s
y
stem from shuttin
g
down due to lack of power. Alwa
y
s use fresh alkaline batteries. Nonalkaline
batteries do not last as lon
g
. The
y
also can leak, causin
g
dama
g
e to the thermostat and the wall surface.
Hone
y
well recommends Ener
g
izer®batteries.
STEP 6. MOUNT THE THERMOSTAT
M16424
80
90
70
60
90
80
70
60
M12703
B. PRESS LOWER
EDGE OF CASE
TO LATCH.
A. ENGAGE TABS AT TOP
OF THERMOSTAT
AND WALLPLATE.

11 69-1284—2
STEP 7. CUSTOMIZE YOUR THERMOSTAT
Your Hone
y
well CT3550 thermostat comes preset to the most commonl
y
used settin
g
s. The settin
g
s are:
—Gas or oil forced air furnace.
—Smart Response technolo
gy
on.
—Temperature °F.
—12-hour clock format.
You can chan
g
e an
y
or all of these settin
g
s.
IMPORTANT
Always press the keys with your fingertip or a similar blunt tool. Sharp instruments like pens and pencil
points can damage the keyboard.
❑Press and hold down , , and , simultaneousl
y
until the screen shows.
You now can chan
g
e an
y
of these settin
g
s.
Fan Operation (Feature Number 2)
Fan operation options are:
—0 = Gas or oil furnace. Furnace controls fan operation durin
g
heatin
g
(preset).
—1 = Electric furnace or sin
g
le sta
g
e heat pump. Thermostat controls fan operation durin
g
heatin
g
.
To chan
g
e fan operation:
❑Press once.
❑Press Time to move to next feature or to return to main displa
y
.
System Type (Feature Number 4)
S
y
stem t
y
pe options are:
—1 = Gravit
y
or steam s
y
stem.
—3 = Hot water, hi
g
h efficienc
y
furnace (90% or better), or sin
g
le sta
g
e heat pump.
—6 = Gas or oil forced air furnace (preset).
—9 = Electric furnace.
M13347
FEATURE
NUMBER
OPTION
Run
Program
M13348

69-1284—212
To chan
g
e
y
our s
y
stem t
y
pe:
❑Press until displa
y
shows
y
our furnace or boiler t
y
pe.
❑Press Time to move to next feature or to return to main displa
y
.
Smart Response™Technology (Feature Number 13)
Smart Response technolo
gy
options are:
—0 = Smart Response technolo
gy
on (preset).
—1 = Smart Response technolo
gy
off.
To turn Smart Response technolo
gy
on or off:
❑Press once.
❑Press Time to move to next feature or to return to main displa
y
.
NOTE: See Smart Response technolo
gy
(pa
g
e 20) for information about this feature.
Temperature Format (Feature Number 14)
Temperature format options are:
—0 = °F (preset).
—1 = °C.
To chan
g
e temperature format:
❑Press once.
❑Press Time to move to next feature or to return to main displa
y
.
Time Format (Feature Number 16)
Time format options are:
—0 = 12-hour clock (preset).
—1 = 24-hour clock.
To chan
g
e time format:
❑Press once.
❑Press to return to main displa
y
.
Run
Program
M13343
Run
Program
M13344
Run
Program
M13345
Run
Program

13 69-1284—2
Factory Set Function (Feature Number 37)
Do not chan
g
e this settin
g
.
STEP 8. SET THE CLOCK
Set Current Day and Time
NOTE: On initial power-up, the screen flashes 1:00 pm until
y
ou press a ke
y
.
❑Press .
❑Press until screen shows current da
y
.
❑Press time or until screen shows current time. (Tappin
g
the will advance the time in one hour
increments).
❑Press .
STEP 9. PROGRAMMING
The ke
y
board is located behind the thermostat cover. The three most frequentl
y
used ke
y
s are near the displa
y
.
Pressin
g
displa
y
s the current temperature settin
g
s. Pressin
g
the and ke
y
s chan
g
e the temperature. The
thermostat displa
y
s da
y
, time, pro
g
ram period, temperature, s
y
stem and fan settin
g
s.
There is an individual ke
y
for each of the four pro
g
ram periods:
—The pro
g
ram period when
y
ou want the house at a comfortable temperature when
y
ou
g
et up and while
y
ou
g
et read
y
for work or school. (This is a hi
g
her temperature durin
g
the heatin
g
season and a lower
temperature durin
g
the coolin
g
season).
—The pro
g
ram period
y
ou can set for an ener
gy
-savin
g
temperature while
y
ou are awa
y
at work or school.
(This is a lower temperature durin
g
the heatin
g
season and a hi
g
her temperature durin
g
the coolin
g
season).
—The pro
g
ram period when
y
ou want the house at a comfortable temperature for activities before bedtime.
(This is a hi
g
her temperature durin
g
the heatin
g
season and a lower temperature durin
g
the coolin
g
season).
—The pro
g
ram period
y
ou can set for an ener
gy
-savin
g
temperature while
y
ou sleepin
g
. (This is a lower
temperature durin
g
the heatin
g
season and a hi
g
her temperature durin
g
the coolin
g
season).
M13346
Set Current
Day/Time
Day
Set Current
Day/Time
Run
Program
Wake
Leave
Return
Sleep

69-1284—214
Table 3 can be helpful when plannin
g
y
our schedule of time and temperature settin
g
s. The thermostat default settin
g
s
are shown in parentheses ( ). Table 3. Personal Programming Table.
aYour heatin
g
setpoints cannot be hi
g
her than 90°F (32°C) or lower than 40°F (4.5°C).
bYour coolin
g
setpoints cannot be hi
g
her than 99°F (37°C) or lower than 45°F (7°C).
Program Weekdays
Start b
y
pro
g
rammin
g
the wake time and temperature for weekda
y
s.
❑Press and release .
❑Press until the (Mon-Fri) displa
y
s.
❑Press Time or ke
y
until the desired time shows in the displa
y
.
NOTE: Pro
g
ram times are in 15 minute intervals. For example, 8:00, 8:15, 8:30.
Period Default Setting Weekday (Mon-Fri) Saturday (Sat) Sunday (Sun)
Wake Time (6:00AM)
Heata(70°F/21°C)
Coolb(78°F/25.5°C)
Leave Time (8:00AM)
Heata(62°F/16.5°C)
Coolb(85°F/29.5°C)
Return Time (6:00PM)
Heata(70°F/21°C)
Coolb(78°F/25.5°C)
Sleep Time (10:00PM)
Heata(62°F/16.5°C)
Coolb(82°F/28°C)
Wake
Day

15 69-1284—2
❑Press or until the desired wake temperature displa
y
s.
The setpoint temperature ran
g
e is 40°F to 90°F (4.5°C to 32°C) for heatin
g
and 45°F to 99°F (7°C to 37°C) for coolin
g
.
❑Press to switch between setpoints.
NOTE: Pro
g
ram times are the same for heatin
g
and coolin
g
.
❑Press or until the displa
y
shows the desired temperature setpoint.
❑Press until the fan is at the desired settin
g
(On or Auto).
NOTE: Settin
g
Fan to On runs the s
y
stem fan continuousl
y
in the pro
g
ram periods.
❑Press , or and repeat these steps for each time period. Your weekda
y
is now pro
g
rammed.
Program Saturday and Sunday
❑Repeat each step in Pro
g
ram Weekda
y
s for Saturda
y
and Sunda
y
.
❑Press when the entire week is pro
g
rammed.
Clear a Program Period
NOTE: Wake cannot be cleared.
❑Press , , or for the pro
g
ram period
y
ou want to clear.
❑Press until the desired da
y
displa
y
s (Mon-Fri Sat; Sun).
❑Press and hold the , , or for approximatel
y
3 seconds until the time and temperature clear.
❑Repeat the above steps for each period to be cleared.
❑Press .
Heat/Cool
Settings
Fan
Leave Return Sleep
Run
Program
Leave Return Sleep
Day
Leave Return Sleep
Run
Program

69-1284—216
STEP 10. OPERATING YOUR THERMOSTAT
Change Temperature Setting Until the Next Program Period (Temporary Change)
❑Press or until the screen shows the desired temperature settin
g
.
NOTE: The temporar
y
temperature settin
g
is displa
y
ed for about 3 seconds and then the room temperature is dis-
pla
y
ed. Temporar
y
appears in the displa
y
. The settin
g
cancels when the next pro
g
ram period starts or when
y
ou press .
Change Temperature Setting Indefinitely (Hold)
❑Press until “Heat”or “Cool”is displa
y
ed.
❑Press then or to chan
g
e
y
our settin
g
if desired. (The displa
y
chan
g
es from showin
g
the setpoint
temperature to room temperature after approximatel
y
three seconds).
❑To cancel “Hold”press .
Change the Temperature Setting Until a Designated Day and Period (Vacation Hold)
❑Press twice.
❑Press or until the displa
y
shows the desired temperature setpoint.
❑Press time until the desired number of da
y
s that
y
ou will be awa
y
(1 throu
g
h 255) is displa
y
ed.
❑Press , , or to select the pro
g
ram period when
y
ou want the pro
g
ram to restart.
NOTE: If the Vacation Hold needs to be cancelled before the desi
g
nated time, press to return to the pro
g
ram.
Run
Program
System
Hold Temp
Run
Program
Hold Temp
Wake Leave Return Sleep
Run
Program

17 69-1284—2
STEP 11. SET THE FAN AND SYSTEM KEY
Set the Fan Key
Fan On: The fan runs continuousl
y
. Use for improved air circulation or more efficient central air cleanin
g
. (In a heat
onl
y
s
y
stem, the fan runs continuousl
y
onl
y
if the fan rela
y
is connected to the G thermostat terminal).
Press until displa
y
shows On.
Fan Auto: Normal settin
g
for most homes. The equipment controls the fan operation.
Press until displa
y
shows Auto.
NOTE: If
y
ou set the fan to On durin
g
normal operation, the fan reverts to the pro
g
rammed fan settin
g
when the
next pro
g
ram period be
g
ins.
Set the System Key
Heat: The thermostat controls
y
our heatin
g
s
y
stem.
Press until displa
y
shows Heat.
Off: Both the heatin
g
and air conditionin
g
s
y
stems are off.
Press until the displa
y
shows Off.
Cool: The thermostat controls
y
our air conditionin
g
s
y
stem.
Press until the displa
y
shows Cool.
Fan
Fan
System
System
System

69-1284—218
If You Have a Problem Table 4. Solution Guide.
If... Then…
Displa
y
does not appear. •Make sure the batteries are installed correctl
y
.
•Make sure the thermostat is mounted and latched on the wallplate.
Mount and latch the thermostat on the wallplate if it is not.
Temperature settin
g
s will not chan
g
e
(example; cannot set the heatin
g
hi
g
her or the coolin
g
lower).
•Make sure the temperature setpoints are:
40 to 90°F (4.5 to 32°C) for heatin
g
.
45 to 99°F (7 to 37°C) for coolin
g
.
Heatin
g
does not come on. •Make sure the heatin
g
setpoint is above the room temperature.
•Make sure the circuit breaker is not tripped, and reset it if necessar
y
.
•Make sure the power switch at the equipment is in the On position, and
set it to On if it is in the Off position.
•Wait five minutes for the s
y
stem to respond.
•Set the s
y
stem ke
y
to Heat.
Coolin
g
does not come on. •Make sure the coolin
g
setpoint is below the room temperature.
•Make sure the circuit breaker is not tripped, and reset it if necessar
y
.
•Make sure the s
y
stem switch at the air conditioner is in the On position,
and set it to On if it is in the Off position.
•Wait five minutes for the s
y
stem to respond.
•Set the s
y
stem ke
y
to Cool.
S
y
stem on indicator ( = heat, =
cool) is lit, but no warm or cool air is
comin
g
from the re
g
isters.
Wait five minutes after seein
g
the flame or snowflake and check the re
g
isters
a
g
ain. If no there is no hot or cool air comin
g
from the re
g
isters, refer to
Heatin
g
does not come on or Coolin
g
does not come on. If all of this has been
checked, contact
y
our local heatin
g
and coolin
g
contractor.
Displa
y
flashes durin
g
pro
g
rammin
g
. The temperature settin
g
limit has been reached. The heatin
g
settin
g
ran
g
e is
40°F to 90°F (4.5°C to 32°C). The coolin
g
settin
g
ran
g
e is 45°F to 99°F (7°C
to 37°C).

19 69-1284—2
Toll-Free Customer Assistance
Please read and follow the provided instructions for this thermostat. For additional information,
g
o to
www.hone
y
well.com/
y
ourhome or call the Hone
y
well Customer Relations Center at 1-800-468-1502. The Center
hours are Monda
y
throu
g
h Frida
y
, 7:00AM to 5:30PM Central Time.
Before callin
g
, please have the followin
g
information available:
•Thermostat model number. (Located on back of thermostat).
•Thermostat date code. (Located below model number).
•T
y
pe of heatin
g
/coolin
g
s
y
stem (for example, hot water, warm air, oil, or
g
as).
•Location and number of wires connected to the thermostat.
Temperature chan
g
e occurs at the
wron
g
times. 1. Check the pro
g
ram times for the period in question.
2. Make sure the AM and PM settin
g
s are correct.
3. Make sure the current time and da
y
settin
g
s are correct.
4. Repro
g
ram an
y
incorrect settin
g
s.
NOTE: If
y
our thermostat is set for Smart Response control, the start times
occur before
y
our pro
g
rammed comfort periods.
Table 4. Solution Guide.
If... Then…

69-1284—220
SMART RESPONSE™TECHNOLOGY
Your CT3550 is actuall
y
a small computer. The Smart Response technolo
gy
calculates the correct time of da
y
to turn
on
y
our heatin
g
or coolin
g
s
y
stem. Smart Response technolo
gy
considers the followin
g
information.
•Air temperature.
•Wall temperature.
•The time of da
y
when
y
ou want the comfort temperature established.
When the thermostat activates Smart
Response technolo
gy
, the thermostat
displa
y
s In Recover
y
, chan
g
es the setpoint,
and turns on the s
y
stem.
•Your CT3550 thermostat learns from
experience. Each da
y
it checks how
closel
y
it hit the recover
y
tar
g
et and
then adjusts the next da
y
s recover
y
start time accordin
g
l
y
.
•It takes a few da
y
s after installation for
the thermostat to adjust to the local
weather,
y
our lifest
y
le, the construction
of
y
our home, and
y
our heatin
g
/coolin
g
s
y
stem.
•You can turn off Smart Response
technolo
gy
b
y
selectin
g
Conventional
Recover
y
. See Step 7. Customize Your
Thermostat.
System Operating in
Energy Savings Mode
Recovery
Begins
Recovery
Continues
System Operating
in Comfort Mode
ENERGY
SAVINGS
PERIOD
RECOVERY FROM ENERGY SAVINGS
5:305:00 6:00 6:30
COMFORT
PERIOD
TIME
THERMOSTAT USES THE SAME SCHEME TO RETURN TO LOWER COMFORT TEMPERATURE DURING
THE COOLING SEASON.
M18591
62°F
64°F
66°F
68°F
Heat
System
Mon In
Room
AM
Recovery
Sleep
Heat
System
Wake
Mon
Room
AM
Heat
Heat
System
Mon In
Room
AM
Recovery
Sleep
Heat
System
Mon
Room
AM
Sleep
Heat
IF In Recovery IS DISPLAYED, PRESS TO SEE THE COMFORT SETPOINT.
1
1
TEMPERATURE